BOOL CALLBACK Worker( VOID )
{
    // memory basic informations
    MEMORY_BASIC_INFORMATION   mbiData32 = { 0 };   // sizeof == 0x1C
    MEMORY_BASIC_INFORMATION64 mbiData64 = { 0 };   // sizeof == 0x30

    // system info
    SYSTEM_INFO SystemInfo = { 0 };

    //...
}

typedef struct _MEMORY_BASIC_INFORMATION {
    PVOID BaseAddress;
    PVOID AllocationBase;
    DWORD AllocationProtect;
    SIZE_T RegionSize;
    DWORD State;
    DWORD Protect;
    DWORD Type;
} MEMORY_BASIC_INFORMATION, *PMEMORY_BASIC_INFORMATION;

typedef struct DECLSPEC_ALIGN(16) _MEMORY_BASIC_INFORMATION64 {
    ULONGLONG BaseAddress;
    ULONGLONG AllocationBase;
    DWORD     AllocationProtect;
    DWORD     __alignment1;
    ULONGLONG RegionSize;
    DWORD     State;
    DWORD     Protect;
    DWORD     Type;
    DWORD     __alignment2;
} MEMORY_BASIC_INFORMATION64, *PMEMORY_BASIC_INFORMATION64;